the-biergarten-app/web/backend/Database/Database.Migrations/scripts/02-functions/UDF_GetStateProvinceIdByCode.sql

CREATE
OR
ALTER FUNCTION dbo.UDF_GetStateProvinceIdByCode
    (
    @StateProvinceCode NVARCHAR(6)
    )
    RETURNS UNIQUEIDENTIFIER
    AS
BEGIN
    DECLARE
@StateProvinceId UNIQUEIDENTIFIER;
SELECT @StateProvinceId = StateProvinceID
FROM dbo.StateProvince
WHERE ISO3166_2 = @StateProvinceCode;
RETURN @StateProvinceId;
END;